[BUG][jaxrs-jersey] Generating @DefaultValue("null") for query parameter with referenced enum is wrong

[jmini]

Description

Generatated @DefaultValue("null") in the Api file is wrong.

With the provided example, in SomeApi:

    @GET
    @Path("/change")
    
    @Produces({ "application/json" })
    @io.swagger.annotations.ApiOperation(value = "", notes = "", response = String.class, tags={ "Some", })
    @io.swagger.annotations.ApiResponses(value = { 
        @io.swagger.annotations.ApiResponse(code = 200, message = "Ok", response = String.class) })
    public Response changeGet(@ApiParam(value = "", defaultValue="null") @DefaultValue("null") @QueryParam("color") BasicColor color
,@Context SecurityContext securityContext)
    throws NotFoundException {
        return delegate.changeGet(color,securityContext);
    }

Should be @DefaultValue("RED") in order for the server to start.

openapi-generator version

There was no issue with 3.2.0. Reproducible with 3.3.4 and 4.0.0-SNAPSHOT

OpenAPI declaration file content or url

openapi: 3.0.1
info:
  title: Default value test
  version: '1.0'
servers:
  - url: 'http://localhost:8088/'
paths:
  /ping:
    get:
      tags:
        - Some
      operationId: pingGet
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                type: string
  /say:
    get:
      tags:
        - Some
      operationId: sayGet
      parameters:
        - name: message
          in: query
          required: false
          schema:
            type: string
            default: hello
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                type: string
  /reply:
    get:
      tags:
        - Some
      operationId: replyGet
      parameters:
        - name: something
          in: query
          required: false
          schema:
            type: string
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                type: string
  /select:
    get:
      tags:
        - Some
      operationId: selectGet
      parameters:
        - name: dayOfTheWeek
          in: query
          required: false
          schema:
            $ref: "#/components/schemas/Day"
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                type: string
  /change:
    get:
      tags:
        - Some
      operationId: changeGet
      parameters:
        - name: color
          in: query
          required: false
          schema:
            $ref: "#/components/schemas/BasicColor"
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                type: string
  /modify:
    get:
      tags:
        - Some
      operationId: modifyGet
      parameters:
        - name: priority
          in: query
          required: false
          schema:
            type: string
            default: low
            enum:
              - "high"
              - "medium"
              - "low"
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                type: string
  /check:
    get:
      tags:
        - Some
      operationId: checkGet
      parameters:
        - name: status
          in: query
          required: false
          schema:
            type: string
            enum:
              - "Ok"
              - "Error"
      responses:
        '200':
          description: Ok
          content:
            application/json:
              schema:
                type: string
components:
  schemas:
    Day:
      type: string
      enum:
        - "Monday"
        - "Tuesday"
        - "Wednesday"
        - "Thursday"
        - "Friday"
        - "Saturday"
        - "Sunday"
    BasicColor:
      type: string
      default: Red
      enum:
        - "Red"
        - "Blue"
        - "Green"

Command line used for generation

Jersey generator

Steps to reproduce

Start the server, you will see stacktrace like:

org.glassfish.jersey.internal.inject.ExtractorException: org.glassfish.jersey.internal.inject.ExtractorException: java.lang.IllegalArgumentException: No enum constant org.openapitools.model.BasicColor.null
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor.convert (AbstractParamValueExtractor.java:145)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor.access$000 (AbstractParamValueExtractor.java:56)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor$1.get (AbstractParamValueExtractor.java:85)
    at org.glassfish.jersey.internal.util.collection.Values$LazyUnsafeValueImpl.get (Values.java:425)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor.<init> (AbstractParamValueExtractor.java:91)
    at org.glassfish.jersey.server.internal.inject.SingleValueExtractor.<init> (SingleValueExtractor.java:67)
    at org.glassfish.jersey.server.internal.inject.MultivaluedParameterExtractorFactory.process (MultivaluedParameterExtractorFactory.java:123)
    at org.glassfish.jersey.server.internal.inject.MultivaluedParameterExtractorFactory.get (MultivaluedParameterExtractorFactory.java:100)
    at org.glassfish.jersey.server.internal.inject.AbstractValueFactoryProvider.get (AbstractValueFactoryProvider.java:106)
    at org.glassfish.jersey.server.internal.inject.QueryParamValueFactoryProvider.createValueFactory (QueryParamValueFactoryProvider.java:116)
    at org.glassfish.jersey.server.internal.inject.QueryParamValueFactoryProvider.createValueFactory (QueryParamValueFactoryProvider.java:59)
    at org.glassfish.jersey.server.internal.inject.AbstractValueFactoryProvider.getValueFactory (AbstractValueFactoryProvider.java:134)
    at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getValueFactory (ParameterValueHelper.java:183)
    at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.createValueProviders (ParameterValueHelper.java:147)
    at org.glassfish.jersey.server.model.Invocable.getValueProviders (Invocable.java:320)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.checkValueProviders (ResourceMethodValidator.java:165)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.checkMethod (ResourceMethodValidator.java:106)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.visitJaxrsResourceMethod (ResourceMethodValidator.java:102)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.visitResourceMethod (ResourceMethodValidator.java:92)
    at org.glassfish.jersey.server.model.ResourceMethod.accept (ResourceMethod.java:873)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:161)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.access$000 (ComponentModelValidator.java:90)
    at org.glassfish.jersey.server.model.ComponentModelValidator$1.run (ComponentModelValidator.java:151)
    at org.glassfish.jersey.internal.Errors$1.call (Errors.java:271)
    at org.glassfish.jersey.internal.Errors$1.call (Errors.java:267)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:267)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validate (ComponentModelValidator.java:146)
    at org.glassfish.jersey.server.ApplicationHandler.initialize (ApplicationHandler.java:550)
    at org.glassfish.jersey.server.ApplicationHandler.access$500 (ApplicationHandler.java:184)
    at org.glassfish.jersey.server.ApplicationHandler$3.call (ApplicationHandler.java:350)
    at org.glassfish.jersey.server.ApplicationHandler$3.call (ApplicationHandler.java:347)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:297)
    at org.glassfish.jersey.internal.Errors.processWithException (Errors.java:255)
    at org.glassfish.jersey.server.ApplicationHandler.<init> (ApplicationHandler.java:347)
    at org.glassfish.jersey.servlet.WebComponent.<init> (WebComponent.java:392)
    at org.glassfish.jersey.servlet.ServletContainer.init (ServletContainer.java:177)
    at org.glassfish.jersey.servlet.ServletContainer.init (ServletContainer.java:369)
    at javax.servlet.GenericServlet.init (GenericServlet.java:244)
    at org.eclipse.jetty.servlet.ServletHolder.initServlet (ServletHolder.java:612)
    at org.eclipse.jetty.servlet.ServletHolder.initialize (ServletHolder.java:395)
    at org.eclipse.jetty.servlet.ServletHandler.initialize (ServletHandler.java:871)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext (ServletContextHandler.java:298)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp (WebAppContext.java:1349)
    at org.eclipse.jetty.maven.plugin.JettyWebAppContext.startWebapp (JettyWebAppContext.java:296)
    at org.eclipse.jetty.webapp.WebAppContext.startContext (WebAppContext.java:1342)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart (ContextHandler.java:741)
    at org.eclipse.jetty.webapp.WebAppContext.doStart (WebAppContext.java:505)
    at org.eclipse.jetty.maven.plugin.JettyWebAppContext.doStart (JettyWebAppContext.java:365)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart (ContextHandlerCollection.java:163)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
    at org.eclipse.jetty.server.Server.start (Server.java:387)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
    at org.eclipse.jetty.server.Server.doStart (Server.java:354)
    at org.eclipse.jetty.maven.plugin.JettyServer.doStart (JettyServer.java:73)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.startJetty (AbstractJettyMojo.java:534)
    at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.execute (AbstractJettyMojo.java:357)
    at org.eclipse.jetty.maven.plugin.JettyRunMojo.execute (JettyRunMojo.java:167)
    at org.eclipse.jetty.maven.plugin.JettyStartMojo.execute (JettyStartMojo.java:48)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:134)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:309)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: org.glassfish.jersey.internal.inject.ExtractorException: java.lang.IllegalArgumentException: No enum constant org.openapitools.model.BasicColor.null
    at org.glassfish.jersey.server.internal.inject.ParamConverters$AbstractStringReader.fromString (ParamConverters.java:95)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor.convert (AbstractParamValueExtractor.java:139)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor.access$000 (AbstractParamValueExtractor.java:56)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor$1.get (AbstractParamValueExtractor.java:85)
    at org.glassfish.jersey.internal.util.collection.Values$LazyUnsafeValueImpl.get (Values.java:425)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor.<init> (AbstractParamValueExtractor.java:91)
    at org.glassfish.jersey.server.internal.inject.SingleValueExtractor.<init> (SingleValueExtractor.java:67)
    at org.glassfish.jersey.server.internal.inject.MultivaluedParameterExtractorFactory.process (MultivaluedParameterExtractorFactory.java:123)
    at org.glassfish.jersey.server.internal.inject.MultivaluedParameterExtractorFactory.get (MultivaluedParameterExtractorFactory.java:100)
    at org.glassfish.jersey.server.internal.inject.AbstractValueFactoryProvider.get (AbstractValueFactoryProvider.java:106)
    at org.glassfish.jersey.server.internal.inject.QueryParamValueFactoryProvider.createValueFactory (QueryParamValueFactoryProvider.java:116)
    at org.glassfish.jersey.server.internal.inject.QueryParamValueFactoryProvider.createValueFactory (QueryParamValueFactoryProvider.java:59)
    at org.glassfish.jersey.server.internal.inject.AbstractValueFactoryProvider.getValueFactory (AbstractValueFactoryProvider.java:134)
    at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getValueFactory (ParameterValueHelper.java:183)
    at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.createValueProviders (ParameterValueHelper.java:147)
    at org.glassfish.jersey.server.model.Invocable.getValueProviders (Invocable.java:320)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.checkValueProviders (ResourceMethodValidator.java:165)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.checkMethod (ResourceMethodValidator.java:106)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.visitJaxrsResourceMethod (ResourceMethodValidator.java:102)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.visitResourceMethod (ResourceMethodValidator.java:92)
    at org.glassfish.jersey.server.model.ResourceMethod.accept (ResourceMethod.java:873)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:161)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.access$000 (ComponentModelValidator.java:90)
    at org.glassfish.jersey.server.model.ComponentModelValidator$1.run (ComponentModelValidator.java:151)
    at org.glassfish.jersey.internal.Errors$1.call (Errors.java:271)
    at org.glassfish.jersey.internal.Errors$1.call (Errors.java:267)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:267)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validate (ComponentModelValidator.java:146)
    at org.glassfish.jersey.server.ApplicationHandler.initialize (ApplicationHandler.java:550)
    at org.glassfish.jersey.server.ApplicationHandler.access$500 (ApplicationHandler.java:184)
    at org.glassfish.jersey.server.ApplicationHandler$3.call (ApplicationHandler.java:350)
    at org.glassfish.jersey.server.ApplicationHandler$3.call (ApplicationHandler.java:347)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:297)
    at org.glassfish.jersey.internal.Errors.processWithException (Errors.java:255)
    at org.glassfish.jersey.server.ApplicationHandler.<init> (ApplicationHandler.java:347)
    at org.glassfish.jersey.servlet.WebComponent.<init> (WebComponent.java:392)
    at org.glassfish.jersey.servlet.ServletContainer.init (ServletContainer.java:177)
    at org.glassfish.jersey.servlet.ServletContainer.init (ServletContainer.java:369)
    at javax.servlet.GenericServlet.init (GenericServlet.java:244)
    at org.eclipse.jetty.servlet.ServletHolder.initServlet (ServletHolder.java:612)
    at org.eclipse.jetty.servlet.ServletHolder.initialize (ServletHolder.java:395)
    at org.eclipse.jetty.servlet.ServletHandler.initialize (ServletHandler.java:871)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext (ServletContextHandler.java:298)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp (WebAppContext.java:1349)
    at org.eclipse.jetty.maven.plugin.JettyWebAppContext.startWebapp (JettyWebAppContext.java:296)
    at org.eclipse.jetty.webapp.WebAppContext.startContext (WebAppContext.java:1342)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart (ContextHandler.java:741)
    at org.eclipse.jetty.webapp.WebAppContext.doStart (WebAppContext.java:505)
    at org.eclipse.jetty.maven.plugin.JettyWebAppContext.doStart (JettyWebAppContext.java:365)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart (ContextHandlerCollection.java:163)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
    at org.eclipse.jetty.server.Server.start (Server.java:387)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
    at org.eclipse.jetty.server.Server.doStart (Server.java:354)
    at org.eclipse.jetty.maven.plugin.JettyServer.doStart (JettyServer.java:73)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.startJetty (AbstractJettyMojo.java:534)
    at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.execute (AbstractJettyMojo.java:357)
    at org.eclipse.jetty.maven.plugin.JettyRunMojo.execute (JettyRunMojo.java:167)
    at org.eclipse.jetty.maven.plugin.JettyStartMojo.execute (JettyStartMojo.java:48)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:134)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:309)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: java.lang.IllegalArgumentException: No enum constant org.openapitools.model.BasicColor.null
    at java.lang.Enum.valueOf (Enum.java:238)
    at org.openapitools.model.BasicColor.valueOf (BasicColor.java:25)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.glassfish.jersey.server.internal.inject.ParamConverters$TypeValueOf$1._fromString (ParamConverters.java:157)
    at org.glassfish.jersey.server.internal.inject.ParamConverters$AbstractStringReader.fromString (ParamConverters.java:85)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor.convert (AbstractParamValueExtractor.java:139)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor.access$000 (AbstractParamValueExtractor.java:56)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor$1.get (AbstractParamValueExtractor.java:85)
    at org.glassfish.jersey.internal.util.collection.Values$LazyUnsafeValueImpl.get (Values.java:425)
    at org.glassfish.jersey.server.internal.inject.AbstractParamValueExtractor.<init> (AbstractParamValueExtractor.java:91)
    at org.glassfish.jersey.server.internal.inject.SingleValueExtractor.<init> (SingleValueExtractor.java:67)
    at org.glassfish.jersey.server.internal.inject.MultivaluedParameterExtractorFactory.process (MultivaluedParameterExtractorFactory.java:123)
    at org.glassfish.jersey.server.internal.inject.MultivaluedParameterExtractorFactory.get (MultivaluedParameterExtractorFactory.java:100)
    at org.glassfish.jersey.server.internal.inject.AbstractValueFactoryProvider.get (AbstractValueFactoryProvider.java:106)
    at org.glassfish.jersey.server.internal.inject.QueryParamValueFactoryProvider.createValueFactory (QueryParamValueFactoryProvider.java:116)
    at org.glassfish.jersey.server.internal.inject.QueryParamValueFactoryProvider.createValueFactory (QueryParamValueFactoryProvider.java:59)
    at org.glassfish.jersey.server.internal.inject.AbstractValueFactoryProvider.getValueFactory (AbstractValueFactoryProvider.java:134)
    at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.getValueFactory (ParameterValueHelper.java:183)
    at org.glassfish.jersey.server.spi.internal.ParameterValueHelper.createValueProviders (ParameterValueHelper.java:147)
    at org.glassfish.jersey.server.model.Invocable.getValueProviders (Invocable.java:320)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.checkValueProviders (ResourceMethodValidator.java:165)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.checkMethod (ResourceMethodValidator.java:106)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.visitJaxrsResourceMethod (ResourceMethodValidator.java:102)
    at org.glassfish.jersey.server.model.ResourceMethodValidator.visitResourceMethod (ResourceMethodValidator.java:92)
    at org.glassfish.jersey.server.model.ResourceMethod.accept (ResourceMethod.java:873)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:161)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validateWithErrors (ComponentModelValidator.java:167)
    at org.glassfish.jersey.server.model.ComponentModelValidator.access$000 (ComponentModelValidator.java:90)
    at org.glassfish.jersey.server.model.ComponentModelValidator$1.run (ComponentModelValidator.java:151)
    at org.glassfish.jersey.internal.Errors$1.call (Errors.java:271)
    at org.glassfish.jersey.internal.Errors$1.call (Errors.java:267)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:297)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:267)
    at org.glassfish.jersey.server.model.ComponentModelValidator.validate (ComponentModelValidator.java:146)
    at org.glassfish.jersey.server.ApplicationHandler.initialize (ApplicationHandler.java:550)
    at org.glassfish.jersey.server.ApplicationHandler.access$500 (ApplicationHandler.java:184)
    at org.glassfish.jersey.server.ApplicationHandler$3.call (ApplicationHandler.java:350)
    at org.glassfish.jersey.server.ApplicationHandler$3.call (ApplicationHandler.java:347)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:315)
    at org.glassfish.jersey.internal.Errors.process (Errors.java:297)
    at org.glassfish.jersey.internal.Errors.processWithException (Errors.java:255)
    at org.glassfish.jersey.server.ApplicationHandler.<init> (ApplicationHandler.java:347)
    at org.glassfish.jersey.servlet.WebComponent.<init> (WebComponent.java:392)
    at org.glassfish.jersey.servlet.ServletContainer.init (ServletContainer.java:177)
    at org.glassfish.jersey.servlet.ServletContainer.init (ServletContainer.java:369)
    at javax.servlet.GenericServlet.init (GenericServlet.java:244)
    at org.eclipse.jetty.servlet.ServletHolder.initServlet (ServletHolder.java:612)
    at org.eclipse.jetty.servlet.ServletHolder.initialize (ServletHolder.java:395)
    at org.eclipse.jetty.servlet.ServletHandler.initialize (ServletHandler.java:871)
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext (ServletContextHandler.java:298)
    at org.eclipse.jetty.webapp.WebAppContext.startWebapp (WebAppContext.java:1349)
    at org.eclipse.jetty.maven.plugin.JettyWebAppContext.startWebapp (JettyWebAppContext.java:296)
    at org.eclipse.jetty.webapp.WebAppContext.startContext (WebAppContext.java:1342)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart (ContextHandler.java:741)
    at org.eclipse.jetty.webapp.WebAppContext.doStart (WebAppContext.java:505)
    at org.eclipse.jetty.maven.plugin.JettyWebAppContext.doStart (JettyWebAppContext.java:365)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
    at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart (ContextHandlerCollection.java:163)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
    at org.eclipse.jetty.server.Server.start (Server.java:387)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
    at org.eclipse.jetty.server.Server.doStart (Server.java:354)
    at org.eclipse.jetty.maven.plugin.JettyServer.doStart (JettyServer.java:73)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
    at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.startJetty (AbstractJettyMojo.java:534)
    at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.execute (AbstractJettyMojo.java:357)
    at org.eclipse.jetty.maven.plugin.JettyRunMojo.execute (JettyRunMojo.java:167)
    at org.eclipse.jetty.maven.plugin.JettyStartMojo.execute (JettyStartMojo.java:48)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:134)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:309)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:498)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)

Related issues/PRs

There was #540 to fix something with 3.2.2

Suggest a fix

There is some code that check for this:

openapi-generator/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractJavaCodegen.java

Lines 806 to 816 in 60ca0fb

	} else if (ModelUtils.isStringSchema(p)) {
	if (p.getDefault() != null) {
	String _default = (String) p.getDefault();
	if (p.getEnum() == null) {
	return "\"" + escapeText(_default) + "\"";
	} else {
	// convert to enum var name later in postProcessModels
	return _default;
	}
	}
	return null;

But because of the referenced-Schema the block is skipped (at this point the Referenced-Schema is not a StringSchema)

[jmini]

After merge of PR #2001, there is still work to do:

With the path:

  /change:
    get:
      tags:
        - Some
      operationId: changeGet
      parameters:
        - name: color
          in: query
          required: false
          schema:
            $ref: "#/components/schemas/BasicColor"

And following schema:

    BasicColor:
      type: string
      default: Red
      enum:
        - "Red"
        - "Blue"
        - "Green"

With the latest 4.0.0-SNAPSHOT the current status is that the @DefaultValue is generated, but it contains the value @DefaultValue("Red") where the enum name should be used @DefaultValue("RED") to match the enum value name: org.openapitools.model.BasicColor.RED("Red")

[antonio-petricca]

My workaround:

• Latest plugin beta (at the time I am writing is 4.0.0-beta3)
• Enum value in upper case

[lelvisl]

if you have enums in query string with mime-types or something else, that you can't capitalize, this workaround won't work.